Extracting prog: 1m33.964867266s Minimizing prog: 2m10.55304536s Simplifying prog options: 3m25.4410975s Extracting C: 58.523561164s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware single: successfully extracted reproducer found reproducer with 1 syscalls minimizing guilty program testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x0, 0x0, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect program did not crash simplifying guilty program options testing program (duration=44.823013615s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash testing program (duration=44.823013615s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware validation run: crashed=true testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash validation run: crashed=false testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash validation run: crashed=false testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program did not crash validation run: crashed=false testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware validation run: crashed=true testing program (duration=44.823013615s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect detailed listing: executing program 0: syz_usb_connect(0x0, 0x2d, &(0x7f0000000000)={{0x12, 0x1, 0x310, 0x28, 0xd2, 0xc9, 0x20, 0x1039, 0x2131, 0x86ad, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x1b, 0x2, 0xe, 0x6, 0x10, 0x3, "", [{{0x9, 0x4, 0xdb, 0xd8, 0x0, 0xc, 0xa9, 0x5a, 0x8}}, {{0x9, 0x4, 0x65, 0x5, 0x0, 0xff, 0x5f, 0x53, 0x2}}]}}]}}, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x0}) program crashed: KASAN: slab-use-after-free Read in uea_upload_pre_firmware validation run: crashed=true reproducing took 14m26.044462713s repro crashed as (corrupted=false): kobject: kobject_add_internal failed for firmware (error: -2 parent: 1-1) firmware ueagle-atm!eagleII.fw: fw_load_sysfs_fallback: device_register failed ================================================================== BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline] BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x98/0x3f8 drivers/usb/atm/ueagle-atm.c:598 Read of size 8 at addr ffff0000d3fc30b8 by task kworker/0:3/4752 CPU: 0 UID: 0 PID: 4752 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Workqueue: events request_firmware_work_func Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xb0/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __intf_to_usbdev include/linux/usb.h:752 [inline] uea_upload_pre_firmware+0x98/0x3f8 drivers/usb/atm/ueagle-atm.c:598 request_firmware_work_func+0xe8/0x24c drivers/base/firmware_loader/main.c:1164 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Allocated by task 4969: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2e8/0x5ec mm/slub.c:5515 _kmalloc_noprof include/linux/slab.h:969 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] usb_set_configuration+0x2f4/0x158c drivers/usb/core/message.c:2096 usb_generic_driver_probe+0x8c/0x148 drivers/usb/core/generic.c:250 usb_probe_device+0x114/0x2b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x29c/0x800 drivers/base/dd.c:706 __driver_probe_device+0x1e0/0x350 drivers/base/dd.c:868 driver_probe_device+0x6c/0x19c drivers/base/dd.c:898 __device_attach_driver+0x198/0x2f8 drivers/base/dd.c:1026 bus_for_each_drv+0x144/0x1dc drivers/base/bus.c:500 __device_attach+0x248/0x390 drivers/base/dd.c:1098 device_initial_probe+0x90/0xc8 drivers/base/dd.c:1153 bus_probe_device+0x58/0x120 drivers/base/bus.c:620 device_add+0x6cc/0x9e0 drivers/base/core.c:3772 usb_new_device+0x9bc/0x11f0 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x1ef0/0x39fc drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Freed by task 4969: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x74/0xa4 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kfree+0x188/0x690 mm/slub.c:6720 usb_release_interface+0xf0/0x13c drivers/usb/core/message.c:1840 device_release+0xb4/0x1d4 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1dc/0x4b8 lib/kobject.c:737 put_device+0x28/0x40 drivers/base/core.c:3880 usb_disable_device+0x400/0x670 drivers/usb/core/message.c:1485 usb_disconnect+0x230/0x6f8 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x299c/0x39fc drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 The buggy address belongs to the object at ffff0000d3fc3000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 184 bytes inside of freed 2048-byte region [ffff0000d3fc3000, ffff0000d3fc3800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113fc0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 head: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc34ff001 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d3fc2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d3fc3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d3fc3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d3fc3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d3fc3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== usb 1-1: [UEAGLE-ATM] firmware is not available Unable to handle kernel paging request at virtual address dfff800000000001 KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 [dfff800000000001] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 4752 Comm: kworker/0:3 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Workqueue: events request_firmware_work_func pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] pc : do_raw_spin_lock+0x80/0x2d0 kernel/locking/spinlock_debug.c:115 lr : __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:133 [inline] lr : _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:166 sp : ffff80009b0678e0 x29: ffff80009b067960 x28: dfff800000000000 x27: ffff70001360cf48 x26: ffff0000caac6b58 x25: ffff0000c1df1c00 x24: 1fffe0001800bc81 x23: dfff800000000000 x22: ffff70001360cf20 x21: 528a8000804365ac x20: 000000000000000c x19: 0000000000000008 x18: 00000000ffffffff x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d x14: 0000000000000001 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80009b067900 x10: ffff8000885d98f2 x9 : 0000000000000001 x8 : f3f3f3f8f1f1f1f1 x7 : 0000000000000000 x6 : ffff8000804365ac x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dbbbd7c0 x0 : 0000000000000008 Call trace: debug_spin_lock_before kernel/locking/spinlock_debug.c:-1 [inline] (P) do_raw_spin_lock+0x80/0x2d0 kernel/locking/spinlock_debug.c:115 (P) __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:166 complete_with_flags+0x30/0xcc kernel/sched/completion.c:25 complete+0x14/0x20 kernel/sched/completion.c:52 uea_upload_pre_firmware+0x1e4/0x3f8 drivers/usb/atm/ueagle-atm.c:668 request_firmware_work_func+0xe8/0x24c drivers/base/firmware_loader/main.c:1164 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Code: f2fe7e68 d343fe89 aa0003f3 f90002c8 (38f76928) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f2fe7e68 movk x8, #0xf3f3, lsl #48 4: d343fe89 lsr x9, x20, #3 8: aa0003f3 mov x19, x0 c: f90002c8 str x8, [x22] * 10: 38f76928 ldrsb w8, [x9, x23] <-- trapping instruction final repro crashed as (corrupted=false): kobject: kobject_add_internal failed for firmware (error: -2 parent: 1-1) firmware ueagle-atm!eagleII.fw: fw_load_sysfs_fallback: device_register failed ================================================================== BUG: KASAN: slab-use-after-free in __intf_to_usbdev include/linux/usb.h:752 [inline] BUG: KASAN: slab-use-after-free in uea_upload_pre_firmware+0x98/0x3f8 drivers/usb/atm/ueagle-atm.c:598 Read of size 8 at addr ffff0000d3fc30b8 by task kworker/0:3/4752 CPU: 0 UID: 0 PID: 4752 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Workqueue: events request_firmware_work_func Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xb0/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __intf_to_usbdev include/linux/usb.h:752 [inline] uea_upload_pre_firmware+0x98/0x3f8 drivers/usb/atm/ueagle-atm.c:598 request_firmware_work_func+0xe8/0x24c drivers/base/firmware_loader/main.c:1164 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Allocated by task 4969: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2e8/0x5ec mm/slub.c:5515 _kmalloc_noprof include/linux/slab.h:969 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] usb_set_configuration+0x2f4/0x158c drivers/usb/core/message.c:2096 usb_generic_driver_probe+0x8c/0x148 drivers/usb/core/generic.c:250 usb_probe_device+0x114/0x2b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x29c/0x800 drivers/base/dd.c:706 __driver_probe_device+0x1e0/0x350 drivers/base/dd.c:868 driver_probe_device+0x6c/0x19c drivers/base/dd.c:898 __device_attach_driver+0x198/0x2f8 drivers/base/dd.c:1026 bus_for_each_drv+0x144/0x1dc drivers/base/bus.c:500 __device_attach+0x248/0x390 drivers/base/dd.c:1098 device_initial_probe+0x90/0xc8 drivers/base/dd.c:1153 bus_probe_device+0x58/0x120 drivers/base/bus.c:620 device_add+0x6cc/0x9e0 drivers/base/core.c:3772 usb_new_device+0x9bc/0x11f0 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x1ef0/0x39fc drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Freed by task 4969: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x74/0xa4 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kfree+0x188/0x690 mm/slub.c:6720 usb_release_interface+0xf0/0x13c drivers/usb/core/message.c:1840 device_release+0xb4/0x1d4 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1dc/0x4b8 lib/kobject.c:737 put_device+0x28/0x40 drivers/base/core.c:3880 usb_disable_device+0x400/0x670 drivers/usb/core/message.c:1485 usb_disconnect+0x230/0x6f8 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x299c/0x39fc drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 The buggy address belongs to the object at ffff0000d3fc3000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 184 bytes inside of freed 2048-byte region [ffff0000d3fc3000, ffff0000d3fc3800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113fc0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 head: 0000000000000000 0000000800080008 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc34ff001 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d3fc2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d3fc3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d3fc3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d3fc3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d3fc3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== usb 1-1: [UEAGLE-ATM] firmware is not available Unable to handle kernel paging request at virtual address dfff800000000001 KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 [dfff800000000001] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 4752 Comm: kworker/0:3 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Workqueue: events request_firmware_work_func pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] pc : do_raw_spin_lock+0x80/0x2d0 kernel/locking/spinlock_debug.c:115 lr : __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:133 [inline] lr : _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:166 sp : ffff80009b0678e0 x29: ffff80009b067960 x28: dfff800000000000 x27: ffff70001360cf48 x26: ffff0000caac6b58 x25: ffff0000c1df1c00 x24: 1fffe0001800bc81 x23: dfff800000000000 x22: ffff70001360cf20 x21: 528a8000804365ac x20: 000000000000000c x19: 0000000000000008 x18: 00000000ffffffff x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d x14: 0000000000000001 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80009b067900 x10: ffff8000885d98f2 x9 : 0000000000000001 x8 : f3f3f3f8f1f1f1f1 x7 : 0000000000000000 x6 : ffff8000804365ac x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dbbbd7c0 x0 : 0000000000000008 Call trace: debug_spin_lock_before kernel/locking/spinlock_debug.c:-1 [inline] (P) do_raw_spin_lock+0x80/0x2d0 kernel/locking/spinlock_debug.c:115 (P) __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:166 complete_with_flags+0x30/0xcc kernel/sched/completion.c:25 complete+0x14/0x20 kernel/sched/completion.c:52 uea_upload_pre_firmware+0x1e4/0x3f8 drivers/usb/atm/ueagle-atm.c:668 request_firmware_work_func+0xe8/0x24c drivers/base/firmware_loader/main.c:1164 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Code: f2fe7e68 d343fe89 aa0003f3 f90002c8 (38f76928) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f2fe7e68 movk x8, #0xf3f3, lsl #48 4: d343fe89 lsr x9, x20, #3 8: aa0003f3 mov x19, x0 c: f90002c8 str x8, [x22] * 10: 38f76928 ldrsb w8, [x9, x23] <-- trapping instruction